[my335i403]

Originally Posted by Munchi435i

Yes you can run the upgraded turbo with stock fueling. That's what I'm currently doing and my car is also a daily driver. So far I have about 5k miles on the PS2 with no issues but I'm trying to run more boost lol

Thats all I want to know... was the ps2 a worthwhile upgrade? I am on a bm3 stage 2 tune now... but I wanna add a ps2, and trying to figure out the easiest way to get enough out of the upgraded turbo to make it worth doing

[MunchiM40i]

Yes the price is worth it and having the car just keep pulling after 5000rpms feels so much better over stock but fueling or octane will need to be sorted out!

[my335i403]

Originally Posted by Munchi435i

Yes the price is worth it and having the car just keep pulling after 5000rpms feels so much better over stock but fueling or octane will need to be sorted out!

What have you done?

[MunchiM40i]

Originally Posted by my335i403

What have you done?

FBO and EWG PS2 on stock fueling. The plan is to eventually increase boost but my hpfp will need to be changed otherwise rail pressure will just drop at the top rpm band.

[T_H_O_M_A_S]

if you want to fully utilize your ps2 ( e20 and up ) go xdi ,
if you want 18-19psi on pumpgas , the b58 will do

stock turbo possible to max it out , one guy with his M2 n55 did it even with e30 i believe he was doing

[Tricki]

This baby arrived today... hoping to install it into my M2.

[Mike.]

so people that have installed this, how much of a difference in your revised tune is there?

[Amack]

I have my ps2 here waiting to be installed. I have been really concerned about the hpfp since day one of prep for the build since I'll be using the mhd ots ps2 map. This seems like a logical step untill the xdi product or another alternative comes on the market.

As another user has mentioned us Australians would almost pay 3500$ including import tax on the xdi and that's absurd!!

I'd love to hear thoughts from fellow n55 ps2 users? How far can custom maps take this pump?

[T_H_O_M_A_S]

c'mon guys , the answer is a few replies up , more info on the other pages

[my335i403]

Originally Posted by T_H_O_M_A_S

if you want to fully utilize your ps2 ( e20 and up ) go xdi ,
if you want 18-19psi on pumpgas , the b58 will do

stock turbo possible to max it out , one guy with his M2 n55 did it even with e30 i believe he was doing

So are you saying I could hit 19 psi on stock turbo on pump 93 with the b58 hpfp

How much psi can you get the ps2 up to on pump 93 only

[MunchiM40i]

Originally Posted by my335i403

So are you saying I could hit 19 psi on stock turbo on pump 93 with the b58 hpfp

How much psi can you get the ps2 up to on pump 93 only

stock turbo with stock fueling will hold around 16psi up until 5000rpms or so.

Stock turbo with B58 could possible do 17-18psi until redline but im not entirely sure about that.

I currently am able to hold 16psi until redline with stock fueling and PS2.

With B58 pump i might be able to squeeze another 1-2psi.

[my335i403]

Originally Posted by Munchi435i

stock turbo with stock fueling will hold around 16psi up until 5000rpms or so.

Stock turbo with B58 could possible do 17-18psi until redline but im not entirely sure about that.

I currently am able to hold 16psi until redline with stock fueling and PS2.

With B58 pump i might be able to squeeze another 1-2psi.

What did you have before the ps2 as far as tune?
I am just wondering if going from bm3 stage 2 93
To a ps2 with stock fueling will give me a noticeable difference accross the rpm band especially down low...i have a 550 rwhp c6 grand Sport and it has a centrifuge supercharger that starts the boost around 4000 rpm or so and builds to redline... what i love about my 360 or so hp bmw 335 is its fast and very torquey down low. I am wondering if the ps2 will improve everywhere no just above 5k

[harkes]

The fueling or pump does not have an influence on how much boost the turbo can deliver. The physical dimensions of the turbo decide this. 16psi @ redline for stock EWG sound about right. At around 17-18psi (PS2 required for this) the stock HPFP will give up and pressure will start to drop with misfires as a consequence. This again will depend on IAT as lower IAT will put even more load of the pump. The volumetric efficiency of the B58 pump over the N55 is 5% better hence you can run 1-2psi more boost. The upper limit of the PS2 @ redline is around 23psi.

[harkes]

Originally Posted by my335i403

What did you have before the ps2 as far as tune?
I am just wondering if going from bm3 stage 2 93
To a ps2 with stock fueling will give me a noticeable difference accross the rpm band especially down low...i have a 550 rwhp c6 grand Sport and it has a centrifuge supercharger that starts the boost around 4000 rpm or so and builds to redline... what i love about my 360 or so hp bmw 335 is its fast and very torquey down low. I am wondering if the ps2 will improve everywhere no just above 5k

The PS2 will have noticeable lag over the stock turbo. You need to be above 3000rpm for instant response.

[Raymondo1234]

Originally Posted by harkes

The PS2 will have noticeable lag over the stock turbo. You need to be above 3000rpm for instant response.

I'm running the xdi pump/pure turbo stage 2 and on your common or garden 93 octane I see 22 psi. (With analogue boost tap)

On e30 it's 24psi.

Very exciting to see what the alternative options bring. Competition is always a good thing, and I would love to see more and more people pushing these very capable cars.

[harkes]

Originally Posted by Raymondo1234

I'm running the xdi pump/pure turbo stage 2 and on your common or garden 93 octane I see 22 psi. (With analogue boost tap)

On e30 it's 24psi.

Very exciting to see what the alternative options bring. Competition is always a good thing, and I would love to see more and more people pushing these very capable cars.

Do you mind sharing a log running 93? I was under the impression that octane isn't enough for those boost levels without sacrificing timing.

[Raymondo1234]

Originally Posted by harkes

Do you mind sharing a log running 93? I was under the impression that octane isn't enough for those boost levels without sacrificing timing.

I haven't saved the logs for 93 I only saved them for the e30 tune as I was just interested in the highest possible numbers I dared go on the xdrive. I'm sure sooner rather than later I will be back at TTFS and I will run it on the 93.

It's not only me who is getting these sorts of psi on 93. Do bare in mind I'm on custom tunes from pureboost with several revisions.

Whenever I do run 93 (not that much at the moment, as with the nicer weather I'm addicted to the e30 tune) I consistently see peak boost of 22. And that's with an analogue reading.

[tokwc]

This is my log of my 435i, with PS2, XDI-35, stock plug, Wagner evo2 competition IC, HJS 300cel DP, with MHD PS2 93 octane OTS (for stock fuel system). Running 93Octane petrol in a hot 89 degree temp. Looks like it will still be happy pretty happy with stock hpfp.
https://datazap.me/u/tokwc88/bmw-435...-106-82-122-37

[MunchiM40i]

Originally Posted by tokwc

This is my log of my 435i, with PS2, XDI-35, stock plug, Wagner evo2 competition IC, HJS 300cel DP, with MHD PS2 93 octane OTS (for stock fuel system). Running 93Octane petrol in a hot 89 degree temp. Looks like it will still be happy pretty happy with stock hpfp.
https://datazap.me/u/tokwc88/bmw-435...-106-82-122-37

This is great feedback to hear since i tried to use the PS2 OTS map but like its been mentioned the rail pressure just drops past 5000rpms.

Here is a log using the PS2 OTS map with 93 octane and stock fueling:

https://datazap.me/u/munchi/ps2-ots-...0&data=4-19-20

[my335i403]

Originally Posted by Munchi435i

This is great feedback to hear since i tried to use the PS2 OTS map but like its been mentioned the rail pressure just drops past 5000rpms.

Here is a log using the PS2 OTS map with 93 octane and stock fueling:

https://datazap.me/u/munchi/ps2-ots-...0&data=4-19-20

Who has a ots ps2 tune? Please tell me bootmod3

[Tricki]

Originally Posted by my335i403

Who has a ots ps2 tune? Please tell me bootmod3

Both logs above are MHD OTS 93 PS2

Just shows the importance that if you go PS2 the XDI HPFP is a must.
Looks perfect with the XDI but stock is rubbish.

Would have been good to see how the B58 pumps in the above comparison.

[tokwc]

Originally Posted by Munchi435i

This is great feedback to hear since i tried to use the PS2 OTS map but like its been mentioned the rail pressure just drops past 5000rpms.

Here is a log using the PS2 OTS map with 93 octane and stock fueling:

https://datazap.me/u/munchi/ps2-ots-...0&data=4-19-20

That being said, your ignition timings looks good under the nice cool weather (my IAT is > 100 and ignition timing is shit) and the torque act value just don't drop as much as mine..

What spark plugs are u using?